how can i use brackets intead of full code in php
suppose i have a variable in a seperate php file i.e
$imgfile = "images/img.jpg";
开发者_开发问答now i have a php file where i am including a html or another php file i.e
<?php
include("foo.html");
?>
and in foo.html i have the following code..
<html>
<head>
<title>foo site</title>
</head>
<body>
<img src="<?php echo $imgfile; ?>">
and it is works but i am including that $imgfile many times so i want not to type
<?php echo $imgfile; ?> again and again.. i have seen many scripts that include such files by just typing {$imgfile} but i don't know how to use it please let me know how can i use such a format..??
PHP is a template engine already.
so, it has shorter form for echo statement, especially for this purpose:
<?=$imgfile?>
considerable shorter and comparable to {$imgfile}
Note that to make use of brackets, you'll have to devise alternatives for loops, conditions and other statements, which will complicate your life.
while using PHP as a template, you'll be able to use built-in PHP operators, like foreach or if or include.
So, it would be better to stick to <?=$imgfile?> syntax.
Just make sure you have short_open_tags setting turned on
I think Smarty, a templating engine, is what you are looking for. See this link: http://smarty.net/
In order to achieve this behavior you should use a template engine like Smarty or write your own interpreter that will replace such expressions with the appropriate values.
e.g.
$buffer = 'Hello {$world}';
$world = "World";
if(preg_match_all("/{([^}]+)}/im", $buffer, $matches, PREG_SET_ORDER)) {
foreach($matches as $match) {
$expression = $match[0];
$exactMatch = $match[1];
if(defined($exactMatch)) {
$buffer = str_replace($expression, constant($exactMatch), $buffer);
} else {
if(strrpos($exactMatch, "$") !== false) {
$vars = get_defined_vars();
$var = str_replace("$", "", $exactMatch);
if(isset($vars[$var])) {
$buffer = str_replace($expression, $vars[$var], $buffer);
}
}
if(is_callable($exactMatch)) {
$buffer = str_replace($expression, call_user_func($exactMatch), $buffer);
}
}
}
}
echo $buffer;
There are three options for you here.
1) assign <img src="<?php echo $imgfile; ?>"> to a shorter string
$a = "<img src='$imgfile'>";
Then in your templates
<html>
<head>
<title>foo site</title>
</head>
<body>
<img src="<?php echo $imgfile; ?>">
2) Use a placeholder then buffer and post process your output.
In your templates
<?php echo ob_start('myReplacementCallback') ?>
<html>
<head>
<title>foo site</title>
</head>
<body>
{{imgfile}}
<?php ob_end_flush (); ?>
Define myReplacementCallback somewhere:
function myReplacementCallback($contents) {
$replacements = array(
'{{imgfile}}' => "<img src='/path/to/image'>",
);
return str_replace(array_keys($replacements), $replacements, $contents);
}
3) Use a template engine like twig or smarty. (Prefered method)
加载中,请稍侯......
精彩评论